If your confidential work documents have been exposed through a data leak, the following steps should be taken:

1. Contact your supervisor and company's IT department immediately.
2. Document the incident, i.e. print out screens of related data.
3. Limit further access to the leaked documents, such as disabling hyperlinks, or restricting access to the uploaded files.
4. Assess the impact of the data leak, i.e. what kinds of documents have been exposed? Who has access to them?
5. Review and update protocols and security protocols to prevent further data breaches.